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. 1977 Mar;4(3):747-59.
doi: 10.1093/nar/4.3.747.

Synthesis of oligonucleotides with sequences identical with or analogous to the 3'-end of 16S ribosomal RNA of Escherichia coli: preparation of m-6-2-A-C-C-U-C-C and A-C-C-U-C-m-4-2C via phosphotriester intermediates

J H van Boom, P M Burgers, G van der Marel, G Wille
Free PMC article

Synthesis of oligonucleotides with sequences identical with or analogous to the 3'-end of 16S ribosomal RNA of Escherichia coli: preparation of m-6-2-A-C-C-U-C-C and A-C-C-U-C-m-4-2C via phosphotriester intermediates

J H van Boom et al. Nucleic Acids Res. 1977 Mar.
Free PMC article

Abstract

The synthesis of two fully-protected hexanucleotides (11a and 11b) via a phosphotriester approach, which is based on the use of two types of protecting groups for the internucleotide linkages, i.e. one 2,2,2-tribromo-ethyl at the 5'-terminus and four 2-chlorophenyl groups for the remaining linkages, is reported. The hexanucleotides 11a and 11b, assembled via a block-wise two-step phosphotriester method, can be deblocked conveniently to give the two hexamers 12a and 12b containing only 3'leads to5' internucleotide linkages.

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